Health 8-1

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Organ
body part consiting of several kinds of tissue and has a particular job.
Cells
smallest living unit of the body.
Tissue
a group of cells that work together to perform a job
Body System
group of organs that work together to perform an important function
Cartilage
strong, flexible tissue on the ends of some bones, providing a cushion where bones come together, also flexible parts of ears and nose
Ligaments
strong cords of tissue that connect the bones in your joints (bone-bone)
Joint
the point at which two bones meet
Hinge
allows bones to move back and forth, knees + elbows
Ball-and-Socket
allows wide range of movement, shoulder + hip
Fixed
does not move, bony plates of the skull
Scoliosis
deformity of the spin in which the spin develops an S-shaped curve when viewed from behind.
Osteoporosis
disease in which the bones become thin and brittle which increases the risk for fractures
Sprain
stretching or partial tearing of ligaments; pain and inflammation.
Tendons
tough bands of tissue that attach muscle to bones
Voluntary
muscles that you control; open and close your hand, help you walk
Involuntary
muscles you do not control; heart, stomach muscles, intestinal muscles
Smooth
muscle found in body organs, blood vessels, and glands (involuntary)
skeletal
muscle attached to bone (voluntary)
cardiac
muscle found only in the walls of the heart (involuntary)
Biceps
bend your arm at the elbow
trapezius
raises your head and shoulders
gastrocnemius
extends your foot when you walk on tiptoe
deltoid
raises your upper arm
quadriceps
raises your leg
triceps
straightens your arm at the elbow
strain
occurs when a muscle is stretched too far
muscle cramps
muscle contracts suddenly and fails to relax; can occur because of overuse or dehydration
lower pack pain
caused by poor health habits such as poor posture and lack of exercise (weak abdominal muscles)
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